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Finding the Fourth Proportional to 172,075.84, 258,003.52 and 66,808.32

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Solution

The fourth proportional to 172,075.84, 258,003.52 and 66,808.32 is: 100,169.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,075.84 : 258,003.52 = 66,808.32 : x
  2. Step 2: Convert to fraction form
    172,075.84/258,003.52 = 66,808.32/x
  3. Step 3: Cross multiply
    172,075.84x = 258,003.52 × 66,808.32
  4. Step 4: Simplify right side
    172,075.84x = 17,236,781,725.29
  5. Step 5: Solve for x
    x = 17,236,781,725.29/172,075.84
  6. Step 6: Final answer
    x = 100,169.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.